1、執(zhí)行sbin/start-all.sh或sbin/stop-all.sh報錯

ERROR: Attempting to operate on hdfs namenode as root

處理：

在start-dfs.sh，stop-dfs.sh添加：

HDFS_DATANODE_USER=root

HADOOP_SECURE_DN_USER=hdfs

HDFS_NAMENODE_USER=root

HDFS_SECONDARYNAMENODE_USER=root

在start-yarn.sh，stop-yarn.sh添加：

YARN_RESOURCEMANAGER_USER=root

HADOOP_SECURE_DN_USER=yarn

YARN_NODEMANAGER_USER=root

2、執(zhí)行sbin/start-all.sh報錯

Starting namenodes on [hadoop-master-181.pdl] hadoop-master-181: root@hadoop-master-181: Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password).

處理：

配置SSH

ssh-keygen -t rsa

cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys

3、啟動Hadoop配置

etc/hadoop/core-site.xml增加:

<property>

? ? <name>hadoop.tmp.dir</name>

? ? <value>/pdldata/hadoop-3.3.0/data/tmp</value>

</property>

<property>

? ? <name>fs.defaultFS</name>

? ? <value>hdfs://10.0.252.181:8020</value>

</property>

etc/hadoop/hdfs-site.xml增加:

<property>

? ? <name>dfs.replication</name>

? ? <value>1</value>

</property>

<property>

? ? <name>dfs.permissions</name>

? ? <value>false</value>

</property>

<property>

? <name>dfs.http.address</name>

? <value>10.0.252.181:50070</value>

</property>